<template>
  <div>
    <!-- //面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon> </el-alert>
      <!-- 步骤条-->
      <el-steps
        class="el-steps"
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
          :tab-position="'left'"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expandTrigger="hover"
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单Item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">配置管理</el-tab-pane>
          <el-tab-pane label="商品图片" name="3">角色管理</el-tab-pane>
          <el-tab-pane label="商品内容" name="4">定时任务补偿</el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
  </div>
</template>

<script>
export default {
  name: "Add",
  data() {
    return {
      activeIndex: "0",
      //表单数据
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
      },
      //表单的验证数据
      addFormRules: {
        goods_name: [{ required: true, message: "请输入商品名称", trigger: "blur" }],
        goods_price: [{ required: true, message: "请输入商品价格", trigger: "blur" }],
        goods_weight: [{ required: true, message: "请输入商品重量", trigger: "blur" }],
        goods_number: [{ required: true, message: "请输入商品数量", trigger: "blur" }],
        goods_cat: [{ required: true, message: "请选择商品分类", trigger: "blur" }],
      },
      //获取的商品数据
      cateList: [],
      //商品列表配置
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      //获取到的动态数据
      manyTableData: [],
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("商品获取失败");
      }
      this.cateList = res.data;
      console.log(this.cateList);
    },
    //级联选择器变化 会触发的函数
    handleChange() {
      console.log(this.addForm.goods_cat);
      // if (this.addForm.goods_cat.length !== 3) {
      //   this.addForm.goods_cat = [];
      // }
    },
    //切换标签之前触发
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length === 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    //tab标签点击时触发
    async tabClicked() {
      // console.log(this.activeIndex);
      if (this.activeIndex === "1") {
        console.log(this.cateId);
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取失败");
        }
        //将sttr_vale里的字符串转换成数组
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(",");
        });
        this.manyTableData = res.data;
        // console.log(this.manyTabData);
      }
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 1) {
        return this.addForm.goods_cat[0];
      }
      return null;
    },
  },
};
</script>

<style lang="less" scoped>
.el-steps {
  margin-top: 10px;
}
.el-checkbox {
  margin: 0 5x !important;
}
</style>
